Yup, SFT40, though the warmer the tint, the better (for me).
SFT40 is always better than SST40. In general, an SST40 is a minus towards me buying a light.
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If you sold it with SST40 I would just be upset because I’d need to swap it to sft40
Better tint uniformity. More modern emitter, brighter in my experience, more intensity (throw)
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SFT40 of course and it would be REALLY nice if you could also offer a model with the SFT40 3000K High CRI version. 
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Yes!!!
SFT40 5000K is perfect!
I would pick SFT40!
SFT40, obviously.
Any pictures of the IF24 you want to share with us?
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SFT40 95CRI 3000K HD2 or similar.
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SFT40 every time. 5000k or even 3000k.
I have the 3000k one in another light and it is excellent!
I would also definitely prefer SFT40, especially the warmer 5000K or even 3000K (though this one would have slightly narrower appeal I think, not everyone likes warm tints in everyday use)
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I just ordered IF24 on aliexpress:
It looks like sst40 in the product picture:
Could you please clarify if this is a picture of the emitter that is shipping and if so, why you are not using SFT40?
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I think SST-40 are just cheaper.
Hi, JME,
we also have IF24S version,
IF24S uses SFT40 5000K, buck driver
IF24 uses SST40 6000K, fet driver
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Great to hear! 
. The moment the IF24S becomes available I’m getting one!
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That is nice - making a cheaper option for non-enthusiast mass market who just want low price and many lumen, and a more expensive buck driver/enthusiast LED option for us - thanks sofirn!
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IF24S will be a must-buy for me, I was tempted by the IF23 and excited and then disappointed by the SST40 in the IF24.
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The ironic part is that the output likely won’t be that different, although the 24S will cost more, no way around that as it’s just more expensive components.
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